A sub-surface hazard approximately 4.5km upstream of SH1 Bridge has been notified by Transpower. River users are advised to navigate with extra caution in this area. Updates will be provided as the removal work progresses.
Transpower recently completed restoration work following damage to the Roxburgh to Islington transmission line, which was caused by the flooding of the Rangitata River in December 2019.
One transmission tower, Tower 771, had to be replaced in a new location. The damaged tower structure has been removed, however, due to river levels, the remains of the tower foundations have not been able to be retrieved. These are currently 1-2m below the surface.
When flow conditions are favourable, plans to remove the foundations will be put in place. The foundations are expected to be removed in early 2021.
A yellow buoy has been attached to the foundation and will be checked during regular line patrols. Coordinates of both the old tower and new tower are shown below.